5G communication network has come, is a new science and technology, the development of polymer materials also brings new opportunities, high-performance material suppliers are actively preparing for the materials needed for 5G communication. Among them, LFT long fiber reinforced composite material can be used in 5G base station radome, equipment frame, bracket, filter and other aspects and is favored. Today, we will talk about LFT material.

1. Definition and characteristics of LDT-PP

long fiber reinforced thermoplastics (LFT) refers to long, continuous glass fibers, After special process is fully infiltrated by resin, wait until the strip, and then cut into a specific size glass fiber reinforced rubber particles or resin soaked long glass fiber strip directly molded or injection molding material. The length of glass fiber in LFT materials is generally more than 3 mm, and its application and development goal is to be used as semi-structural and structural materials.

Among them, the LFT composites based on polypropylene PP have the advantages of light weight and high strength, easy manufacturing and cost optimization. As a new high performance engineering plastics, it has been widely used. Currently, it is the first choice of polymer matrix composites for automotive lightweight.

2. Preparation process of LFT-PP

According to the preparation technology, the LFT-PP high performance composites can be divided into two categories: LFT-G process and LFT-D-ILC process.

2.1 LDT-G process

Firstly, through the mixing of resin, glass fiber and additives, LFT-G long fiber pellets are prepared by special melt impregnation composite method, and then the final product is finished by injection molding process.

The fiber length of LFT varies with the processing process. Impact properties are particularly dependent on the length of the glass fiber. The length of commercial LFT-G colloidal particles is generally 6 ~ 25mm. The LDT-G composite supports semi-mechanism automotive applications, such as front end components, door components, instrument bearers, tailgate and seating systems, combining lightweight and functionality.

2.2 LFT-D-ILC process

The LDT-D-ILC is called the long fiber reinforced thermoplastic material online molding process technology. This process, the online mixing system is integrated in the molding process, matrix particles and additives are transported to the gravimetric feeding unit combination, which ensures appropriate mixing according to the mechanical properties of the component requirements.

3. The application of LFT-PP

Automotive field: LFT-PP material can not only effectively improve the rigidity, impact strength, creep resistance and dimensional stability of finished products, but also reduce the manufacturing cost of automobile modules, shorten the molding cycle, and prepare sophisticated automobile modules.

5G field: LFT modified materials can be used in 5G base stations; Mobile phone can be used in mobile phone shell, back cover, battery, chip and other components.